A method for efficiently preparing laughing gas

A laughing gas, high-efficiency technology, applied in the field of environment and medical materials, energy, can solve the problem of catalytic activity to be improved, and achieve the effect of low equipment requirements and low process energy consumption

Active Publication Date: 2020-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the carriers used are all inert carriers, the catalytic activity needs to be improved

Method used

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  • A method for efficiently preparing laughing gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: adopt hydrothermal method and grinding sintering method to prepare the catalyst of producing laughing gas:

[0027] 1) Ce(NO with a concentration of 0.03mol / L 3 ) 3 20ml of solution, 140ml of NaOH solution with a concentration of 6mol / L, mixed and put into a hydrothermal kettle, heated and kept at 100°C for 24h; 2 Precipitated suspension;

[0028] 2) After centrifuging the solution with ultrapure water for 3 times, put it into a drying oven and dry it at 60°C for 12 hours;

[0029] 3) Grinding the taken sample into fine particles with an agate mortar, and then heat-treating at 450°C for 3 hours;

[0030] 4) Take the prepared rod-shaped CeO 2 990 mg of the carrier was ground for 10 minutes in an agate mortar to obtain CeO 2 fine powder of the carrier;

[0031] 5) Mix 20.2 mg of platinum acetylacetonate powder with ground CeO 2 Mix the powders and grind them in an agate mortar for 30 minutes to disperse them evenly to obtain mixed powders;

[0032] 6...

Embodiment 2

[0035] Embodiment 2: adopt hydrothermal method and grinding sintering method to prepare the catalyst of producing laughing gas:

[0036] 1) Ce(NO with a concentration of 0.03mol / L 3 ) 3 20ml of solution, 140ml of NaOH solution with a concentration of 6mol / L, mixed and put into a hydrothermal kettle, heated and kept at 100°C for 24h; 2 Precipitated suspension;

[0037] 2) After centrifuging the solution with ultrapure water for 3 times, put it into a drying oven and dry it at 60°C for 12 hours;

[0038] 3) Grinding the taken sample into fine particles with an agate mortar, and then heat-treating at 450°C for 3 hours;

[0039] 4) Take the prepared rod-shaped CeO 2 980 mg of the carrier was ground for 10 minutes in an agate mortar to obtain CeO 2 fine powder of the carrier;

[0040] 5) Mix 40.4 mg of platinum acetylacetonate powder with ground CeO 2 Mix the powders and grind them in an agate mortar for 30 minutes to disperse them evenly to obtain mixed powders;

[0041] 6) ...

Embodiment 3

[0044] Embodiment 3: adopt hydrothermal method and grinding sintering method to prepare the catalyst of producing laughing gas:

[0045] 1) Ce(NO with a concentration of 0.03mol / L 3 ) 3 20ml of solution, 140ml of NaOH solution with a concentration of 6mol / L, mixed and put into a hydrothermal kettle, heated and kept at 100°C for 24h; 2 Precipitated suspension;

[0046] 2) After centrifuging the solution with ultrapure water for 3 times, put it into a drying oven and dry it at 60°C for 12 hours;

[0047] 3) Grinding the taken sample into fine particles with an agate mortar, and then heat-treating at 450°C for 3 hours;

[0048] 4) Take the prepared rod-shaped CeO 2 980 mg of the carrier was ground for 10 minutes in an agate mortar to obtain CeO 2 fine powder of the carrier;

[0049] 5) Mix 57.4 mg of palladium acetylacetonate powder with ground CeO 2 Mix the powders and grind them in an agate mortar for 30 minutes to disperse them evenly to obtain mixed powders;

[0050] ...

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PUM

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Abstract

The invention discloses an efficient method for preparing nitrous oxide. The method comprises the step of reacting by taking NH3, O2 and NO as raw material gas, taking CeO2 or TiO2 as a catalyst carrier and taking palladium, platinum, gold and nickel or several alloy thereof as active components of a catalyst. The catalyst effects of the palladium, the platinum, the gold and the nickel or the alloy thereof and the cocatalysis effect of rare earth oxides CeO2 and TiO2 are fully utilized, and a small amount of NO is added in the raw material gas to remarkably increase the percent conversion of the nitrous oxide. The catalyst is prepared simply and is easy to operate, requirements for equipment are low, energy consumption of a process is low, and the nitrous oxide is easily industrially produced on a large scale. Particularly, when Pt-Ni / TiO2 is selected as a catalyst, the percent conversion can reach up to 88%, and a new thought is provided for synthesis of the nitrous oxide.

Description

technical field [0001] The invention belongs to the fields of energy, environment and medical materials, and in particular relates to a method for efficiently preparing laughing gas. Background technique [0002] The present invention relates to by NH 3 , O 2 , A method for producing laughing gas from NO, and relates to a suitable catalyst for the production of laughing gas. [0003] Laughing gas, also called nitrous oxide, has the molecular formula N 2 O, known primarily as an inhalation anesthetic, is widely used especially in the field of dentistry. At the same time, it is also widely used in industry and military affairs, for example, as a cleaning agent in the semiconductor industry, an additive for rocket fuel, or as a spray propellant (propellant) in the pharmaceutical, cosmetic or food industries. [0004] Laughing gas was first discovered by chemist Joseph Priestley in 1772. In 1799, Humphry Davy, Coleridge and Robert Southey discovered that laughing gas can mak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/22B01J23/89
CPCB01J23/892C01B21/22
Inventor 王勇李成业楼锦泽杨杭生张泽
Owner ZHEJIANG UNIV
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